Re: [CAD_CAM_EDM_DRO] Re: Servos and Controller boards

----- Original Message -----
From: "ballendo" <ballendo@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, April 13, 2004 10:15 PM
Subject: [CAD_CAM_EDM_DRO] Re: Servos and Controller boards


> Nick,
>
> In the PS of the message I just posted, are some resources along the
> lines of what you were asking for...
>
> Ballendo
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Nick Ibbitson"
> <pulseweld@d...> wrote:
> > oops, i have stirred an ants nest here, when i said "build your own
> servo
> > controller" i meant just that , assemble the electronic parts on a
> board,
> > design being way, way beyond my meagre capabilities.
> > I have built my own small cncGantry router and am on my way to
> converting a
> > small mini mill to cnc, i just thought that some one somewhere
> might have
> > already done the servo design bit and created a "map" if you like
> for others
> > to follow. On self examination i think its the journey which
> matters here
> > ref servos. Thanks for the tip for the OSMC. Many thanks all.
> >
> > Nick
> > ----- Original Message -----
> > From: "caudlet" <info@t...>
> > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > Sent: Tuesday, April 13, 2004 12:09 AM
> > Subject: [CAD_CAM_EDM_DRO] Re: Servos and Controller boards
> >
> >
> > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "ballendo" <ballendo@y...>
> > > wrote:
> > > > Tom,
> > > >
> > > > I think many would (and do) say the same thing about building a
> cnc
> > > > machine...
> > > >
> > > > (Why build when I can buy a perfectly good one for a great
> price?)
> > > >
> > > > I hope your reply doesn't keep folks from trying. After all, if
> > > > everybody only did what was "economical", we'd still be buying
> > > > expensive CNC machines.
> > > >
> > > > We are the recipients of MANY folks who "work for free", and I
> hope
> > > > that each one of them continues to find learning and sharing a
> > > > worthwhile exercise, so that one day we can have as many servo
> > > > options as we now have for steppers...
> > > >
> > > > Ballendo
> > > >
> > > > P.S. As "list mom" of the DIY-CNC group, I've heard a
> few "reasons"
> > > > given in answer to the recent thread about posts at CCED. And
> > > they're
> > > > NOT all about moderation... Many have told me that they are
> > > > frustrated by: asking a question for technical advice, only to
> get
> > > a
> > > > reply for a commercial product to buy. We're trying to build NEW
> > > > options, NOT just continue with the old ones... (And "money" is
> NOT
> > > > the only motivation.)
> > > >
> > > >
> > > >
> > > I did not make that post glibly. I would be the first one to
> > > recommend that building vs buying is an indivdual choice. You
> noticed
> > > I said "I would not attempt it". I have done closed loop controls
> > > with servos and spent a good many years working with switching
> power
> > > supplies that require loop calculations (that seldom are right).
> I
> > > have had a top of a plastic TO220 FET embed itself in my forehead.
> > > It's a mix of digital and analog design skills. The newer chips
> are
> > > all SMT and make a hobby level design a challenge for anyone.
> > >
> > > If someone posted and asked about designing and winding their own
> > > stepper or servo motors what would you advise? Each person has to
> > > evaluate their skill level and decide if the effort (and probable
> > > failure) to build something that can be purchased for 65 bucks is
> > > worth the "learning" experience.
> > >
> > > I think there is a subset of the membership that lives vicariously
> > > through the actual builders and can dream up all kinds of
> interesting
> > > engineering projects. Like I have said in the past some of
> > > these "projects" are solutions looking for a problem.
> > >
> > > If someone is looking to dive into the guts of doing a power servo
> > > design they should slide over to the OSMC (Open Source Motor
> > > Control). There you can rub shoulders with guys that have already
> > > tackled the problem of DIY servo controllers, brushless DC (BLDC)
> > > controllers and AC servo control.
> > >
> > > One of our responsibilities (sounds noble huh!) is to help guide
> the
> > > new persons through the maze. Part of that is to take our
> experience
> > > and keep people from heading off down a rough road and maybe loose
> > > them as part of our community. We have people here at all levels
> in
> > > the multitude of skill sets needed to build their own CNC machine.
> > > After reading hundreds of posts about something as simple as an
> > > unregulated power supply and the all the calculations, I just get
> the
> > > drift that the electronics design skill set is not possessed by
> the
> > > majority of the builders. Maybe we need a "star" rating system
> like
> > > they do on DIY TV. Building your own power supply is ** while
> > > designing a closed loop servo for power control is *****.
> > >
> > > I could go on and on but I have to go now. I am working on
> building
> > > my own blender. I am on a limited budget and the commercial
> blenders
> > > are too expensive; besides I need the learning experience and I
> have
> > > a CNC mill that I can turn parts out on and show my wife why I
> spent
> > > all that time building it :-O
> > >
> > >
> > >
> > > Addresses:
> > > FAQ: http://www.ktmarketing.com/faq.html
> > > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > > Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> > >
> > > Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> > > Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> > > List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com,
> wanliker@a...,
> > timg@k...
> > > Moderator: pentam@c... indigo_red@q... davemucha@j...
> > [Moderators]
> > > URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> > >
> > > OFF Topic POSTS: General Machining
> > > If you wish to post on unlimited OT subjects goto:
> > aol://5863:126/rec.crafts.metalworking or go thru Google.com to
> reach it if
> > you have trouble.
> > > http://www.metalworking.com/news_servers.html
> > >
> > > http://groups.yahoo.com/group/jobshophomeshop I consider this
> to be a
> > sister site to the CCED group, as many of the same members are
> there, for OT
> > subjects, that are not allowed on the CCED list.
> > >
> > > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY
> POSTING THEM.
> > DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> > > bill
> > > List Mom
> > > List Owner
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
>
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
timg@...
> Moderator: pentam@... indigo_red@... davemucha@...
[Moderators]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
> Yahoo! Groups Links
>
>
>
>
>